CVVT and Camshaft

Components and Component Location

Components

1. Right Exhaust CVVT 2. Right Intake CVVT

3. Left Intake CVVT 4. Left Exhaust CVVT

Repair Procedures

Removal

Be careful not to damage parts located under the vehicle (floor under cover, fuel filter, fuel tank, and canister) when lifting the vehicle with a lift. (Refer to General Information - Jack Lifting Points and Support Points)

Left VVT and Camshaft

1. 1
   Set the No. 1 cylinder to TDC (top dead center) on the compression stroke.

   1. Turn the crankshaft damper pulley clockwise and align its groove with the "T" alignment mark on the lower timing chain cover.

      

   2. Remove the left cylinder head cover. (Refer to Cylinder Head Assembly – "Cylinder Head Cover")
   3. Check that the camshaft sprocket mark is in a straight line with the cylinder head surface, as shown in the illustration. If not, turn the crankshaft clockwise one full turn (360°). [LH exhaust]

      

      [LH exhaust]

      

      [intake RH]

      

      [RH exhaust]

      

2. 2
   Remove the timing chain. (Refer to Valve Timing System - Timing Chain)
3. 3
   Remove the fuel pump bracket (A).

   

4. 4
   Remove the left exhaust camshaft oil control valve (OCV) (A).

   

5. 5
   Remove the left intake CVVT assembly (A) and exhaust CVVT assembly (B).

   

   To prevent contaminants from entering the intake system of the OCV and center bolt, wear rubber gloves. When removing the CVVT assembly bolt, place a wrench on the position (A) to prevent the camshaft from rotating.

6. 6
   Remove the left camshaft cap (A) and thrust bearing cap (B).

   

7. 7
   Remove the left intake camshaft (A) and exhaust camshaft (B).

   

8. 8
   Set the No. 1 cylinder to TDC (top dead center) on the compression stroke.

   1. Turn the crankshaft damper pulley clockwise and align its groove with the "T" alignment mark on the lower timing chain cover.

      

   2. Remove the right cylinder head cover. (Refer to Cylinder Head Assembly - Cylinder Head Cover)
   3. Check that the camshaft sprocket mark is in a straight line with the cylinder head surface, as shown in the illustration. If not, turn the crankshaft clockwise one full turn (360°). [LH exhaust]

      

      [LH exhaust]

      

      [intake RH]

      

      [RH exhaust]

      

9. 9
   Remove the timing chain. (Refer to Valve Timing System - Timing Chain)
10. 10
    Remove the right exhaust camshaft oil control valve (OCV) (A).

    

11. 11
    Remove the right intake CVVT assembly (A) and exhaust CVVT assembly (B).

    

    To prevent contaminants from entering the intake system of the OCV and center bolt, wear rubber gloves. When removing the CVVT assembly bolt, place a wrench on the position (A) to prevent the camshaft from rotating.

12. 12
    Remove the right camshaft bearing cap (A) and thrust bearing cap (B).

    

13. 13
    Remove the right intake camshaft (A) and exhaust camshaft (B).

    

Right VVT and Camshaft

Inspection

Continuous Variable Valve Timing (CVVT) Assembly

1. 1
   Inspect the exhaust CVVT for smooth rotation.

   1. Clamp the camshaft in a vise. Be careful not to damage the cam lobes and journals in the vise.
   2. Make sure the exhaust CVVT is locked by turning it clockwise or counterclockwise. It must not rotate.
   3. Intake CVVT: Cover one of the two advance holes in the camshaft journal with tape. Exhaust CVVT: Cover one of the two holes in the camshaft journal with tape. [Exhaust]

      

   4. Exhaust CVVT: Apply approx. 150 kPa (1.5 kgf/cm², 21 psi) of compressed air to the unsealed advance hole to release the lock.

      Cover the oil passages with a cloth when applying compressed air to prevent oil from spraying.

   5. While applying compressed air, turn the exhaust CVVT in the retard direction (clockwise) and make sure the CVVT rotates smoothly. Exhaust CVVT phase range 25°±0°30' (from the most retarded position to the most advanced position).

      

   6. Turn the exhaust CVVT to the most advanced position (counterclockwise), then make sure the CVVT is locked.
2. 2
   Inspect the camshaft lobes. Using a micrometer, measure the cam lobe height. Cam lobe height [Standard value] Intake: 47.2 mm (1.858 in) Exhaust: 45.8 mm (1.803 in)

   

   If the cam lobe height is less than specified, replace the camshaft.
3. 3
   Inspect the camshaft journal oil clearance.

   1. Clean the camshaft bearing caps and journals.
   2. Install the camshafts on the cylinder head.
   3. Place a strip of Plastigage on each camshaft journal.

      

   4. Install the bearing cap (A) and thrust bearing cap (B) and tighten to the specified torque. Tightening torque Step 1: 5.8 N·m Step 2: 9.8 - 11.8 N·m

      

      

      Do not rotate the camshaft.

   5. Remove the bearing caps.
   6. Measure the clearance at the widest point. Camshaft bearing oil clearance [Standard value] Intake: No.1 journal: 0.037-0.067 mm (0.0015-0.0026 in) No.2, 3, 4 journals: 0.030-0.067 mm (0.0012-0.0026 in) Exhaust: No.1 journal: 0.027-0.057 mm (0.0010-0.0022 in) No.2, 3, 4 journals: 0.030-0.067 mm (0.0012-0.0026 in)

      

      • If the oil clearance is greater than specified, replace the camshaft.
      • If the oil clearance still exceeds the specification after replacing the camshaft, replace the bearing caps and cylinder head assembly.
   7. Completely remove the plastigage.
   8. Remove the camshafts.
4. 4
   Inspect the camshaft end play.

   1. Install the camshafts.
   2. Install the bearing cap (A) and thrust bearing cap (B) and tighten to the specified torque. Tightening torque Step 1: 5.8 N·m Step 2: 9.8 N·m

      

      

   3. Using a dial indicator, measure the camshaft end play by moving the camshaft back and forth. Camshaft end play [Standard value]: Intake: 0.04-0.18 mm (0.0016-0.0071 in) Exhaust: 0.02-0.18 mm (0.0008-0.0071 in)

      

      

      • If the end play is greater than specified, replace the camshaft.
      • If the end play still exceeds the specification after replacing the camshaft, replace the bearing caps and cylinder head assembly.
   4. Remove the camshafts.

Camshaft

Installation

Apply a thin coat of engine oil to the camshaft journals. Align the keyway at the rear of the camshaft flush with the top surface of the cylinder head. Be careful not to damage the right and left banks and the intake and exhaust sides during assembly.

Intake Camshaft

For the camshaft designations (A, B, C, D, E), refer to the table below.

Displacement	Outer diameter
	left	Right Side
Intake Camshaft	-	A: 30 mm (1.1811 in)
		B: 27 mm (1.0630 in)
		C: 30 mm (1.1811 in)
		D: 30 mm (1.1811 in)
		E: 30 mm (1.1811 in)

Exhaust Camshaft

For the camshaft designations (A, B, C, D), refer to the table below.

Displacement	Outer diameter
	left	Right Side
Exhaust Camshaft	A: 27 mm (1.0630 in)	A: 27 mm (1.0630 in)
	B: 27 mm (1.0630 in)	B: 27 mm (1.0630 in)
	C: 30 mm (1.1811 in)	C: 30 mm (1.1811 in)
	D: 27 mm (1.0630 in)	D: 30 mm (1.1811 in)

Left VVT and Camshaft

1. 1
   Install the left intake camshaft (A) and exhaust camshaft (B).

   

2. 2
   Install the left camshaft bearing cap (A) and thrust bearing cap (B) and tighten to the specified torque. Tightening torque Step 1: 5.8 N·m Step 2: 9.8 - 11.8 N·m

   

   Be sure to install the thrust bearing cap bolts and bearing cap bolts in the correct locations. Be careful not to damage the right and left banks, intake and exhaust sides during assembly. A: L (left), R (right) B: I (intake), E (exhaust) C: Journal number D: Front mark Turn the crankshaft until the pistons are positioned 10 mm (0.3937 in) below the top of the cylinder block so that they do not contact the valves.

3. 3
   Install the left intake CVVT assembly (A) and exhaust CVVT assembly (B). Tightening torque Intake: 24 N·m + 55-61° Exhaust: 64.7 - 76 N·m

   

   To prevent contaminants from entering the intake system of the OCV and center bolt, wear rubber gloves. When installing the intake OCV and center bolt, temporarily install by hand, then fully tighten using the tool. When installing the intake OCV valve and center bolt, tighten to the specified torque. Do not use dropped intake OCV valves or center bolts. When installing the intake CVVT, apply engine oil to the cross section (A) of the OCV. When installing the CVVT assembly bolt, hold the camshaft section A with a wrench. Be careful not to damage the cylinder head and camshaft. Install the intake camshaft onto the locating pin of the CVVT assembly. Make sure the oil hole of the intake camshaft is not installed facing down. Hold the hexagonal part of the camshaft with a vise, then install the bolt and CVVT assembly. Do not rotate the CVVT assembly when installing the camshaft onto the locating pin of the CVVT assembly.

4. 4
   Install the left exhaust camshaft oil control valve (OCV) (A).

   Tightening Torque: 9.8–11.8 N·m

   

5. 5
   Install the fuel pump bracket (A).

   Tightening torque: 18.6 – 24 N·m

   

6. 6
   Install in the reverse order of removal.
7. 7
   Install the right intake camshaft (A) and exhaust camshaft (B).

   

8. 8
   Install the right camshaft bearing cap (A) and thrust bearing cap (B) and tighten to the specified torque. Tightening torque Step 1: 5.8 N·m Step 2: 9.8 - 11.8 N·m

   

   Be sure to install the thrust bearing cap bolts and bearing cap bolts in the correct locations. Be careful not to damage the right and left banks, intake and exhaust sides during assembly. A: L (left), R (right) B: I (intake), E (exhaust) C: Journal number D: Front mark Turn the crankshaft until the pistons are positioned 10 mm (0.3937 in) below the top of the cylinder block so that they do not contact the valves.

9. 9
   Install the right intake CVVT assembly (A) and exhaust CVVT assembly (B). Tightening torque Intake: 24 N·m + 55-61° Exhaust: 64.7 - 76 N·m

   

   To prevent contaminants from entering the intake system of the OCV and center bolt, wear rubber gloves. When installing the intake OCV and center bolt, temporarily install by hand, then fully tighten using the tool. When installing the intake OCV valve and center bolt, tighten to the specified torque. Do not use dropped intake OCV valves or center bolts. When installing the intake CVVT, apply engine oil to the cross section (A) of the OCV. When installing the CVVT assembly bolt, hold the camshaft section A with a wrench. Be careful not to damage the cylinder head and camshaft. Install the intake camshaft onto the locating pin of the CVVT assembly. Make sure the oil hole of the intake camshaft is not installed facing down. Hold the hexagonal part of the camshaft with a vise, then install the bolt and CVVT assembly. Do not rotate the CVVT assembly when installing the camshaft onto the locating pin of the CVVT assembly.

10. 10
    Install the right exhaust camshaft oil control valve (OCV) (A).

    Tightening Torque: 9.8–11.8 N·m

    

11. 11
    Install in the reverse order of removal.

Right VVT and Camshaft